Self oiler



F. DoHRMANN SELF oILER Fi1ed may 21, 1925 INVENTOR. TDQHRMA NN.

. @m2, ATTORNEY.

Abril 2s, 19.25.

Patented Apr. 28, 1925.

. man

FRED DOHRMANN, or NEW YORK, 1v. Y.

SELF OILER.

Application med May 21, 192s. serial No. 646,519.

To all whom t may concern:

Be it known that I, FRED DoirnMaNN, a citizen of the Republic of Germany, residing at lNew York, in the county of New York and State 0f New York, have invented certain new and useful Improvements in Self Oilers, of which the following is a specification.

This invention relates to a combined oil strainer and automatic cut-off valve and more. particularly to a novel and improved device attachable to the crank case of an internal combustion engine whereby the quantity of oil may be ascertained and kept at a predetermined height.

One of the objects of my invention is to provide a combined oil strainer and float operated cut-oftl valve adapted to be positioned within the crank case of an internal combustion engine such as a motor truck, including provision for ascertaining the level of oil in the crank case by the position of the float or from the main supply tank.

A further and continued obj ect of my invention is to provide a combined oil strainer and automatic cut-off valve therefor which is extremely simple in construction, easily assembled, highly eicient in operation and use, practical, durable, and otherwise capable of being manufactured at an extremely low cost, whereby its commercial possibilities are greatly enchanced.

To enable others skilled in the art to fully comprehend the underlying features of my invention that they may embody the same in the various modifications in structure and relation contemplated, drawings depicting a preferred form have been annexed as a part of this disclosure and in such drawings, similar reference characters denote corresponding parts throughout all the views, of which,

Figure l is a view showing the connection between the supply tank and the crank case. of a conventional type of motor vehicle.

Figure 2 is an enlarged detail sectional view showing my invention as attached within the crank case.

Referring now to the drawings, wherein like reference characters designate corresponding parts kthroughout the several views, 5 designates the main supply tank of a motor vehicle, which is positioned preferably adj acent the dash board and 6, a pipe or lead connected to the bottom thereof and extending to the crank case 7, as shown by Figure 1. An oil indicator 8"l on the main tank 5, is provided whereby the level of the oil may be ascertained by the driver.

My invention proper, consists of a cylindrical chamber 8 having an annular flanged bottom 9 and threaded externally as indicated at 10 whereby the chamber may be screwed tightly within the crank case of a motor vehicle. The annular bottom 9, above referred to is provided with an extension 12, which extension is internally threaded as at 13 to receive a valve 14, threaded therein. A coupling 15, connected to the conduit or pipe 6 by the nut 17, communicates with the interior chamber 18, leading to the restricted passage 19 of the valve 20, the latter being secured therein by the nut 21 as clearly shown by Figure 2 of the drawings. The oil, passing through the conduit 6 through the chamber 18 and to the interior chamber 22 of the cylinder iiows into the interior of the crank case through the radially disposed apertures 23 of the cylinder and in order to prevent the passage of any foreign matter or dirt, a screening 25 is secured exteriorly of the cylinder for the obvious purpose. A float 26 provided with a central passage 27 to permit of the movement of a valve stem 28, rises and falls with the introduction and consumption of the oil, said float being secured and attached to the lower end of a rod 29, the latter cxtending through the top of the crank case where the position thereof may be observed by the operator of the machine and the level of the liquid ascertained. The valve stem 28 is provided with a needle point 30 at its lower end and adapted to seat within the valve seat, above referred to, when the maximum quantity of oil is introduced within the crank case. To that end and purpose, the upper end of the stem 28 is provided with a grooved collar 82, which receives the inner ends of the counter-weights or levers 33, pivotally connected as at 34Y to the ears 85, depending from the top 36 ol the cylinder. As the float 26 rises and engages the outer ends of the weights 33, it will. be seenthat the valve stem 28 will be moved downwardly and seated, thus cutting off the admission of oil t0 the crank case. On the other hand, as the oil is being consumed and the float drops, the valve stem will be unseated to permit of the passage of the oil `from the main tank'f as yabove -Set forth.

IVhile I have illustrated and describedni-y-v nvention with some degree of; part icularityg I realize that in practice various alterations therein may be made.l I therefore reserve the right andprivilege of changing the form of the details of construction oihotlierwi'Se length extending` within the casing, a flange formedgon: the bottoinllof said chamber to engage. the betteln of the motor-case, screens surrounding the openings in the chamber, a dueteon-neetingtlle chamber With a source of supply, a valve in the bottom of said chamber for regulating the flow of a liquid though the duet, a valve stein and float within thee-asingfa pair of Weighted elements depending from the top of the casing'7 the inner ends of-saidiweighted elements engagingv the Valve lstern-loy vlower ;the same when said Weighted elements are enga-ged bythe float and means tofdeterminetheposition of said float Wi thin vthe cham-ber;

In testimonywhereofI aix my; signature.

Y FREDDoHRMi-xN-u. ['L. s.; 

